An item with internal machine threads designed to fit the external machine threads of a tube fitting. It has flat faces, one of which has a counterbored recess to accommodate packing, packing or sealing ring(s), gasket(s), and the like. The item, when installed, provides a method of locking and sealing the connection. See also locknut, pipe; nut (1), tube coupling and nut (1), plain, hexagon.
NSN 6110-00-766-0886
NSN 6105-00-812-0505
NSN 5930-01-316-6715
NSN 4140-01-632-2684
NSN 6645-00-103-2517
NSN 5910-01-104-7139
NSN 6150-00-570-0552
NSN 6145-01-359-1657
NSN 5930-01-182-0170
NSN 5925-01-310-8456
NSN 6320-00-701-0437
NSN 6610-01-314-3659